Quantitative Validation of the In-Bean Approach in Coffee Roasting

Area of Science:

• Food Chemistry
• Sensory Science
• Chemical Engineering

Background:

• Coffee flavor is complex, developing during roasting.
• Understanding aroma compound formation is crucial for coffee quality.
• Biomimetic techniques offer controlled environments for studying roasting processes.

Purpose of the Study:

• To evaluate the representativeness of the biomimetic "in-bean" technique.
• To compare aroma compound formation in recombined vs. reference coffee beans.
• To validate the biomimetic approach for studying coffee flavor development.

Main Methods:

• Utilized a biomimetic "in-bean" technique with recombined coffee beans.
• Roasted samples from 0 to 400 seconds.
• Analyzed key aroma compounds using stable isotope dilution assay and SPME-GC-MS.

Main Results:

• Formation kinetics for Strecker aldehydes, alkylpyrazines, and α-diketones were similar in both sample types.
• Final quantities of key odorants were comparable between biomimetic and reference samples.
• The biomimetic approach demonstrated high fidelity to natural roasting processes.

Conclusions:

• The refined biomimetic "in-bean" technique is a valid tool for studying coffee flavor formation.
• This method allows for detailed investigation of volatile compound generation during roasting.
• The approach supports research into factors influencing coffee aroma and taste.